--- title: NPRK url: "https://www.wittenstein-group.com/en-us/product/nprk" date: 2026-02-12 modified: 2026-02-24 lastUpdated: 2026-04-13 --- # NPRK alpha Value Line Bevel gearbox The NPRK bevel gearbox from the alpha Value Line impresses with its integrated slotted holes, which enable precise and flexible mounting. This makes it ideal for use in rack and pinion applications – for maximum efficiency and easy assembly. See CAD data and configure product Downloads ![](https://www.wittenstein-group.com/typo3temp/assets/_processed_/b/3/csm_NPRK-IMAGE_6024af42d4.webp) ### 3 – 100 Ratio ### 33 – 700 Nm Max. torque ### ≤ 11 arcmin Backlash [ Technical details ](#tech-details) [ Further information ](#further-info) [ Related products ](#related) [ Request consultation ](#consultation) ![](https://www.wittenstein-group.com/epim-fs/Wittenstein-Prod-static_content/usp/57-options.svg) ###### Universally applicable The planetary gearboxes of the alpha Value Line are suitable for universal application and offer the best, most economical solution for virtually all requirements – on each axis and for all industries ![](https://www.wittenstein-group.com/epim-fs/Wittenstein-Prod-static_content/usp/60-1-costEffectiveness.svg) ###### High cost-effectiveness The NPRK bevel gearbox impresses with its low acquisition costs, high operating efficiency and maintenance-free operation over its entire service life ![](https://www.wittenstein-group.com/epim-fs/Wittenstein-Prod-static_content/usp/24-7-clever.svg) ###### Clever drive variants The NPRK bevel gearbox with integrated slotted holes and output shaft offers maximum design freedom. Particularly suitable for precise and simple connection to rack and pinion systems - Configure product - Technical data - Available options - Downloads | Product type | | NPRK | |---|---|---| | Design | | MF | | Ratio | | 3 – 100 | | Number of sizes | | 4 | | Max. backlash c) | jt | ≤ 11 arcmin | | Max. torque | T2α | 33 – 700 Nm | | Max. input speed | n1Max | 5000 rpm | | c) In relation to reference sizes | | **Output shape** | | |---|---| | Smooth shaft | ✓ | | Shaft with key d) | ✓ | | Splined shaft (DIN 5480) | ✓ | | **Input shape** | | | Motor-mounted | ✓ | | **Characteristic** | ✓ | | Flange with slotted holes | | | Food-grade lubrication a) b) | ✓ | | **System solutions** | | | Linear system (rack / pinion) | ✓ | | **Accessory** (for more information, see the relevant product pages) | | | Coupling | ✓ | | a) Performance reduction: Technical data available on request b) Please contact WITTENSTEIN alpha d) Performance reduction: For detailed sizing, please use our [cymex®](https://stage.wittenstein-group.com/de-de/produkt/cymex-5) design software | | Document name | Document type | Language | Downloads | |---|---|---|---| | ![CP, CPS, CPK, CPSK, NP, NPL, NPS, NPT, NPR, NTP, NPK, NPLK, NPSK, NPTK, NPRK, CVS, CVH, NVS, NVH, HDV](https://www.wittenstein-group.com/fileadmin/processed_epim_fs/pdf-thumbnails/ALPHA-BASIC-LINE-VALUE-LINE-US-fb4a30e90750.webp "Catalog alpha Basic Line & alpha Value Line") Catalog alpha Basic Line & alpha Value Line CP, CPS, CPK, CPSK, NP, NPL, NPS, NPT, NPR, NTP, NPK, NPLK, NPSK, NPTK, NPRK, CVS, CVH, NVS, NVH, HDV | Brochure /Catalog | American English | [ Download (22 KB) ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=4114&dl=1&st=1739&lg=0&token=53d8b5d5ef298cf06e536271c220fab32aeeade3)[ Open in viewer ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=4114&st=1739&lg=0&token=cfadb9ddb03689be8f750f4f29e33e5ee0d02005) | | ![NPK, NPLK, NPSK, NPTK, NPRK](https://www.wittenstein-group.com/fileadmin/processed_epim_fs/pdf-thumbnails/ALPHA-BASIC-LINE-VALUE-LINE-NPK-NPLK-NPSK-NPTK-NPRK-8bdbd5b0c46f.webp "Technical data / Dimension sheets NPK / NPLK / NPSK / NPTK / NPRK") Technical data / Dimension sheets NPK / NPLK / NPSK / NPTK / NPRK NPK, NPLK, NPSK, NPTK, NPRK | Brochure /Catalog | Neutral | [ Download (2 KB) ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3253&dl=1&st=1739&lg=0&token=e8b2dbd94d86741c57e8007f5beb11c232001ad8)[ Open in viewer ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3253&st=1739&lg=0&token=0c7fcbabbd789c4d50b47114f528080a115ce446) | | ![Technical documents CP, CPS, CPK, CPSK, NP, NPL, NPS, NPT, NPR, NTP, NPK, NPLK, NPTK, NPRK](https://www.wittenstein-group.com/fileadmin/processed_epim_fs/pdf-thumbnails/OPERATING-MANUAL-NP-NPK-NPL-NPLK-NPR-NPRK-NPS-NPSK-NPT-NPTK-NTP-CP-CPK-CPS-CPSK-ea25c5cc4d41.webp "alpha Value Line / alpha Basic Line") alpha Value Line / alpha Basic Line Technical documents CP, CPS, CPK, CPSK, NP, NPL, NPS, NPT, NPR, NTP, NPK, NPLK, NPTK, NPRK | Operating manual | Neutral | [ Download (3 KB) ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3321&dl=1&st=1739&lg=0&token=42f5985a1ce2b3567fe78a37fec8fbf9b55c5d16)[ Open in viewer ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3321&st=1739&lg=0&token=985ed6e750bb9fd85c0169596c7319737296e33a) | | ![](https://www.wittenstein-group.com/fileadmin/processed_epim_fs/pdf-thumbnails/INFORMATION-SEALING-PLATE-190dba672cbe.webp "Sealing Plate") Sealing Plate | Operating manual | Neutral | [ Download (121 B) ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3293&dl=1&st=1739&lg=0&token=c3d69de968cae2150db287914e6e8f2b6fe59b02)[ Open in viewer ](https://www.wittenstein-group.com/index.php?eID=dumpWittFile&t=f&f=3293&st=1739&lg=0&token=94da936c558ddf2b56f754082763bd13e3759ab7) | | Ordering code / CAD data NPRK | CAD / CAE | Neutral | [ Open in viewer ](https://cad-point.wittenstein-group.com/GearDetails/NPRK) | ![](https://www.wittenstein-group.com/fileadmin/_processed_/9/c/csm_logo-sculpture_e38190faf6.webp) Contact us ------------ Would you like to learn more about our solutions? We would be happy to advise you—personally, competently, and tailored to your requirements. [info@wittenstein-us.com](#) [ 1 630 540-5300 ](tel:16305405300) [ To the contact form ](https://www.wittenstein-group.com/en-us/contact-locations/contact) ![](https://www.wittenstein-group.com/fileadmin/_processed_/0/a/csm_nprk-main-image_109a9020e9.webp) Compatible with all common servo motors – thanks to screwed adapter plate and large selection of motor shaft diameters The particularly compact angle step allows insertion even in minimal installation spaces Wide range of ratios from i = 3 to i = 100 – for maximum application versatility The beautifully designed housing emphasizes the dynamics of the gearbox and adds visual accents Splined shaft, smooth or keyed shaft and slotted holes - suitable for flexible assembly ### Value Linear System with NPRK ### cynapse® & smart services ### Accessories ![](https://www.wittenstein-group.com/fileadmin/_processed_/9/4/csm_22339_NPRK_RMK_ZST_tabmodule_46c310250c.webp) The NPRK for coordinated pinion-rack systems for simple requirements. Typical areas of application include woodworking machines, plasma cutting systems, and automation. [Read more](https://www.wittenstein-group.com/en-us/product/value-linear-systems) ![](https://www.wittenstein-group.com/fileadmin/_processed_/f/9/csm_cynapse-produkseite-element_slider_3783d47093.webp) With cynapse® and smart services, you can unleash the full potential of your drive system: sensor data is processed, visualized, and analyzed intelligently. Find out how the combination of gearboxes with cynapse® and our smart services can make your digital production faster, safer, and more efficient. [Read more](https://www.wittenstein-group.com/int-en/products/software-and-digitalization/cynapse-smart-services) ![](https://www.wittenstein-group.com/fileadmin/_processed_/3/0/csm_ELASTOMER-COUPLING-IMAGE-tabmodule_3a6e5abaa1.webp) Optimization of your value chain: Utilize the combination of gearboxes and accessories in a complete package to streamline your internal processes. Find suitable elastomer couplings for our products. [Read more](https://www.wittenstein-group.com/en-us/product/elastomer-couplings) Related products ------------------ ![](https://www.wittenstein-group.com/typo3temp/assets/_processed_/8/c/csm_NPR-IMAGE_4286161082.webp)##### [ NPR ](https://www.wittenstein-group.com/en-us/product/npr) alpha Value Line Ratio3 – 100Max. torque51 – 800 NmBacklash≤ 8 arcmin ![](https://www.wittenstein-group.com/typo3temp/assets/_processed_/1/a/csm_VLS-IMAGE_61b06bb857.webp)##### [ Value Linear Systems ](https://www.wittenstein-group.com/en-us/product/value-linear-systems) alpha Value Line Max. feed force1.89 – 8 kNMax. feed velocity160 – 400 m/minPositioning accuracy (single drive)≥ 140 µm ![](https://www.wittenstein-group.com/typo3temp/assets/_processed_/5/0/csm_NPSK-IMAGE_33b7ab0519.webp)##### [ NPSK ](https://www.wittenstein-group.com/en-us/product/npsk) alpha Value Line Ratio3 – 100Max. torque33 – 700 NmBacklash≤ 11 arcmin ![](https://www.wittenstein-group.com/typo3temp/assets/_processed_/c/8/csm_PINIONS_65164beaba.webp)##### [ Pinion ](https://www.wittenstein-group.com/en-us/product/pinion) Size / module1,5 mm – 8 mmMax. feed forceGearbox-dependentDesignsFactory assembly